E-Procurement web generates Purchase Orders, Sales Orders, and Transfer Orders

Purchase Orders
Purchase Order documents are created in Microsoft Dynamics 365 Business Central considering each vendor’s price and conditions in the company, an additional Job can be created to send PO documents automatically to vendors by e-mail

Sales Orders
When the shop or warehouse is not owned by the Central Purchasing company and requests products, then the document created must be a Sales Order, the price and conditions are set according to the customer price list assigned to the shop company.

In case of sales documents received from affiliated companies, Intercompany Documents and Journals must be setup
Managing intercompany transactions – Business Central | Microsoft Docs
Transfer Orders
Transfer Orders are created when the shop or warehouse asks for goods to the Purchasing Central and both belong to the same company.
